Arylquin 1 is a potent secretagogue of the tumor suppressor protein prostate apoptosis response-4 (Par-4), selectively inducing apoptosis in a variety of cancer cells. Arylquin 1 acts by binding to vimentin, displacing Par-4 from vimentin for secretion. Arylquin 1 produced a dose-dependent secretion of Par-4 at nanomolar concentrations.